KR100237411B1 - Paging area deciding method in cdma system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

CDA mobile communication system

2. The technical problem to be solved by the invention

In the existing call location determination method, call location determination is divided into specific base station unit, CCP unit, exchange unit, and so on to determine the call location. It is to solve the problem of unnecessary waste of resources.

3. Summary of Solution to Invention

A first step of extracting the information of the base station where the terminal is located and the information of the neighboring base station by the location registration message field upon request of the location registration of the terminal; A second step of transmitting the base station information extracted in the first step in a location registration message to a switch so that the home location register manages the location information; And a third step of determining a call area according to the call area information of the base station and the neighboring base station at the time of registering the latest location of the terminal managed by the home location register during the call.

4. Important uses of the invention

It is applied to terminal location registration and calling area determination in CDMA mobile communication system.

Description

Method of Determining Call Area in CDM Mobile Communication System

In general, location registration in a CDMA mobile communication system means that a mobile station (terminal) announces its location to a base station, whereby the base station can efficiently determine the location of the mobile station when a mobile station incoming call occurs. In addition, the mobile station transmits the mobile station identification number (MIN), the calling channel slot, and other characteristics to the base station through the registration process.

There is an inverse functional relationship between the calling frequency of the mobile station and the registration frequency of the mobile station, so that if it is not registered, the system not only knows the location of the mobile station but also the operating status of the mobile station equipment. Therefore, the system has to call a mobile station through every base station or sector, so the call volume is high. However, frequent registrations make it possible to locate the mobile station correctly, which greatly simplifies the calling process. However, frequent registration overloads the access channel and the base station needs to confirm each registration through the calling channel, thereby increasing the load of the calling channel. Since there is an inverse relationship between the frequency of call and registration, it should be designed to optimize the ratio of call channel and access channel of base station equipment.

In the CDMA system, the following eight registration methods are used.

1) Power-On Registration: Performed when the mobile station is powered on or when it is switched from another system or analog system to a CDMA system.

2) Power Off Registration: This is performed when the mobile powers off.

3) Timer registration: It is executed after a certain time.

4) Registration of Record Criteria: It is performed when the distance from the last registration point is out of a certain distance.

5) Regional Standard Registration: This is done when the mobile enters a new area.

6) Parameter change registration: This is performed when the parameters of the mobile station are changed (ie MIN or SLOT-CYCLE-INDEX).

7) Order registration: It is performed when the base station requests registration.

8) Indirect registration: Each time the mobile station uses an access channel, the base station can know the location of the mobile station.

The first six registration methods are autonomous registrations performed by the mobile station upon occurrence of an event (i.e., registration without a registration command of the base station), and the base station may allow or prohibit such self registration. This combination of registration methods can be used very effectively. Several parameters of the autonomous registration scheme can be adjusted. The base station informs the mobile station of the registration scheme to be used and related parameters through a system parameter message.

In the distance-based registration method, the base station sends the latitude, longitude, and distance parameters of the base station through a system parameter message. When the mobile station begins to receive the signal of the new base station, the mobile station receives the latitude and longitude information of the new base station and calculates the distance using the latitude and longitude information and the latitude and longitude information of the last registered base station. If this distance is outside the distance parameter of the last registered base station, the mobile station registers with the new base station, which is the center of the circle surrounded by several base stations. If the mobile leaves this circle, distance-based registration is resumed.

In the regional registration method, the cellular system is divided into several regions or regions. The mobile station and the mobile switching center maintain a list of areas that the mobile station has recently registered, and registration is performed by the mobile station when the mobile station enters an area that is not on this list. Upon completion of registration, the mobile station and the transition office add a new area to their list and set a new timer time for all existing areas. When the timer expires, the mobile station and the mobile switching center delete these areas from the list. Since there are multiple regions in the list, the system can prevent multiple registrations at the boundary between regions, and by setting a timer time for existing regions, the switching center does not need to confirm the existing regions by calling signals. do. The regional registration method is very useful for cellular systems to define interregional or intersystem boundaries.

Next, the power off registration method is performed by the mobile station when the mobile station is powered off. The power off registration may not be performed properly because the mobile station may already be out of the effective range of the system when the power is cut off. Since the portable telephone may be located in an area where the radio wave environment is poor or in an unfavorable direction, and the antenna may be folded, it is more uncertain to perform the power off registration than the previous vehicle telephone. Although power-down registration is uncertain, if done properly, it can prevent the mobile switching center from calling the mobile station unnecessarily.

In addition, the timer-based registration method is performed by the mobile station whenever the time expires. Upon completion of the connection to the system, the base station and the mobile station set a new timer time, with the base station's expiration time being slightly longer than the mobile station's expiration time. If the mobile station has not registered until the base station's time expires, the base station assumes that the mobile station no longer monitors the system or that the mobile station's power down registration has not succeeded.

On the other hand, if the mobile station is registered by the general registration method as described above, the call location is determined next. The existing call location determination method is divided into specific base station units, Call Control Processor (CCP) units, exchange units, and the like. The location will be determined.

Therefore, in the existing call location determination method, call location determination is divided into specific base station unit, CCP unit, exchange unit, and so on to determine the call location. There was a problem that unnecessary resource waste occurs.

Therefore, the present invention has been proposed to solve the above-mentioned problems in determining the existing call area, and an object of the present invention is to determine the call area when calling by managing neighboring base station (BTS) information of the terminal at the time of location registration. The present invention provides a method for determining a call area of a CDA mobile communication system to improve a call response rate.

Method for achieving the object of the present invention,

A first step of extracting the information of the base station where the terminal is located and the information of the neighboring base station by the location registration message field upon request of the location registration of the terminal;

A second step of transmitting the base station information extracted in the first step to a switch by placing the base station information in a location registration message so that the home location register manages the location information;

The third step is to determine the calling area according to the call area information of the base station and the neighboring base station at the time of registering the latest location of the terminal managed by the home location register during the call.

Hereinafter, described in detail with reference to the accompanying drawings, the operation, effects of the present invention.

1 is a flowchart illustrating a location registration process of a mobile station in the present invention.

2 is the purity of the paging process in the present invention.

3 is a diagram showing a calling area in the present invention.

* Explanation of symbols for main parts of the drawings

BCP: BTS Control Processor CCP: Call Control Processor

MSC: Mobile Switching Center HLP: Home Location Registrator

1 is a terminal location registration procedure according to the present invention, which transmits a location registration request from a terminal to a call control processor (CCP) and a base station controller (BCP) from the base station controller processor (BCP). When the registration request message is received, the CCP extracts the information of the base station and the neighbor base station of the terminal and delivers it to the Mobile Switching Center (MSC), and the home location managing the base station and neighbor base station information of the terminal obtained from the MSC. It consists of a home location registrator (HLR), and terminal location registration is performed in the order of terminal-> BCP-> CCP-> MSC-> HLR.

A method of determining a call area according to the present invention will be described with reference to FIGS. 2 and 3 as follows.

First, when a location registration is requested from a mobile station (terminal), the BCP receives the location registration message and delivers the location registration message to the CCP. When the location registration message is received, the CCP refers to the location registration message field and the base station where the terminal is located. Information of the BTS is extracted, and information of neighboring base stations BTS adjacent to the base station BTS is extracted with reference to the program load data PLD. The extracted information is transmitted to a mobile switching center (MSC) by placing the extracted information in a location registration message, and the mobile switching center transmits information about the base station and the neighboring base station of the terminal to the home location register (HLR). To be done.

In this state, when the terminal makes a call, the MSC informs the home location register (HLR) that the terminal has been called, and when the home location register receives the call message, The call area information of the base station and neighboring base stations is extracted (call area determination) and transferred to the mobile telephone exchange. The mobile telephone exchange then makes a call request to the CCP, and the call areas become BCP, BCP ', and BCP ″, thereby terminating the call operation by responding to any base station control processor.

In other words, if the call area is determined by the above method, even if there is a movement of the terminal, the probability of being present in the determined call area is increased, thereby improving the call response rate.

For example, assuming that the base station of the terminal was ① in the attached drawing of FIG. 3 at the time of location registration, the neighboring base station becomes ②, ③, ⑤, ⑥ (select only the base station existing in the calling area as the neighboring base station), and the home The location register manages this, and when calling, the calling area becomes ②, ③ of CCP and ⑤, ⑥ of CCP1 to improve call response rate.

As described above, the present invention has the effect of improving the call response rate by managing the recent base station information and neighbor base station information of the terminal and determining the call area based on the information of the base stations when calling.

In addition, due to the improvement of the call response rate as described above, it is possible to shorten the setup time of the call and reduce the retry of the call due to the non-response of the call, thereby preventing unnecessary waste of resources.

The present invention relates to a method for determining a call area of a CD-A mobile communication system which manages neighbor base station (BTS) information of a terminal at the time of location registration to determine a call area when calling.

Claims (1)

A location registration and paging method of a CDA mobile communication system, comprising: a first step of extracting information of a base station where a terminal is located and information of a neighboring base station by a location registration message field when a location registration request of a terminal is performed; A second step of transmitting a base station information extracted in the first step to a switch by carrying a location registration message to a home location register; And a third step of determining a call area according to the call area information of the base station and its neighboring base station at the time of registering the latest location of the terminal managed by the home location register during the call. How to determine the calling area.

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